Laravel Model Locking by HYPERLINK GROUP

Installation

You can install the package via composer:

composer require hyperlink/laravel-model-locking

You can publish the config file with:

php artisan vendor:publish --provider="Hylk\Locking\ModelLockingServiceProvider" --tag="model-locking-config"

You can publish the translation files with:

php artisan vendor:publish --provider="Hylk\Locking\ModelLockingServiceProvider" --tag="model-locking-translations"

You can publish the vue-components via:

php artisan vendor:publish --provider="Hylk\Locking\ModelLockingServiceProvider" --tag="model-locking-vue"

Usage

Setting up your models

Within a model just use the IsLockable-Trait.

class Post extends Model {
    use \Hylk\ModelLocking\IsLockable;
    
    ...
}

Additionally you have to extend the database-tables for the Model.

return new class extends Migration {
    public function up()
    {
        Schema::table('posts', function (Blueprint $table) {
            $table->lockfields();
        });
    }
    
    public function down()
    {
        Schema::table('posts', function (Blueprint $table) {
            $table->dropLockfields();
        });
    }
}

simple Model-Locking

If you want just a simple version of the locking, just use the Traits methods within your controller. HEARTBEAT_LOCK_DURATION should be set to something like 15 minutes (900 seconds).

class PostController {
    public function show(Post $post) {
      $post->lock();
    }
  
    public function update(Request $request, Post $post) {
      $post->update($request->all());
      $post->unlock();
    }
}

To make sure no locks are missed you should use the locking:release Artisan command in your scheduler. Additionally, you should publish the config and set the lock duration to around 15 minutes.

Model-Locking by heartbeat (Vue)

The more advanced approach is to handle the locks via a heartbeat. This only works for Vue and axios.

1. Publish the vue-components
2. register the global HeartbeatManager

   import Vue from 'vue';
   import HeartbeatManager from './vendor/hylk/laravel-model-locking/heartbeat-manager';
   ...
   window.axios = require('axios');
   ...
   Vue.use(HeartbeatManager);

3. register the Listener-Components
   1. for index-pages

   <template>
       <div>
           <HeartbeatListener model-class="App\Models\Post"
               :model-id="model_id"
               @locked="setLockState"
               @unlocked="deleteLockState" />
           ...
       </div>
   </template>

   Handle the wished behavior like showing the current locker by the lock event and delete this information on the unlock-event.

   ...
      <span v-if="isLocked(model_id)">Locked by {{ getLock(model_id).locked_by.name }}</span>
   ...

4. register the LockRefresher on your Edit-form.

   <template>
      <div>
         <HeartbeatLockRefresher model-class="App\Models\Post"
             :model-id="model_id"
             @lost="reloadRoute()" />
         ...
      </div>
    </template>

   The lost-Event shows if the component tries to render if the model is locked by another user than the logged in.

Environment variables

Variable	Default	Description
HEARTBEAT_LOCK_DURATION	70	The time in seconds a model is locked.
MIX_HEARTBEAT_REFRESH	60	The time in seconds between the heartbeats. Should be a multiple of the MIX_HEARTBEAT_STATUS-interval.
MIX_HEARTBEAT_STATUS	30	The time in seconds between the heartbeats for status-request (index-Listener).
MIX_HEARTBEAT_ENABLED	true	Activates or deactivates the heartbeats.

config

Beside the environment variables, there is a middleware key to determine the middleware(s) used by the heartbeat-route. Default it's set to api.